Skiving machine



M. H. BALLARD 1,771,606

SKIVING MACHINE Filed Jan. 14, 1922 2 Sheets-Sheet l =HLH-1' V y 29,1930. M. H. BALLARD 1,771,606 w SKIVING MACHINE Filed Jan. 14, 1922 2Sheets-Sheet 2 IIIIIIIIIIIIIIIIIIIIIIL'l Patented July 29, 1930 aminoSTA TBS-PATENT oFricE HOSE'ITS, ASSIGNOE TO UNITED SHOE MA- N, NEW?!JERSEY, A CORPORATION OF NEW SKIVING ivraorrrnn Application filedJanuary 14, 1922. Serial No. 529,237.

This invention relates to skiving machines and is herein illustrated asembodied in a machine of the Amazeen type. V

In machines of this type the work is fed by a cooperating feed roll andfeed disk to a rotary kni engagement of its edge with a gage and beingheld down upon fe', the work being guided by stationary edge roll closeto'the edge of the knife by a presserfoot. The presser-foot, which mayraised and lowered to provide for pieces work of diff margin of thecated close to gage. Hithe of erent thicknesses, engages the work andhas an end-face lothe operative face of the edge rto, the presser-foothas been so mounted that raising and lowering it has caused it to tiltmore or less,

that, in some enough space with the result of its positions, there hasbeen between the end face of the presser-foot and the operative face ofthe edge gage to to rlse betwe edge of the work does so use, theaccuracy permit the edge of the work en these two faces. When the of theskiving operation is destroyed since According the illustrated pressercontact with and I lowered the two faces. tion the presser-foot the edgegage no longer functions properly.

feature of the invention has an end face in the operative face of theedge to one without causing separation of In the 1llustrated construchasa stem whlch is received in a vertical guideway. Its movement is thusvertlcal; the two faces referred to above are also vertical, andconsequently the faces remain presser foot.

Other features improvement roll for angular and to the prov] These andin contact in all positions of the of the invention relate to themounting of the feed and longitudinal adjustment, 'sion of means fordeflecting away from the cutting point the skiving operation.

other features of the invention sin including certain details ofconstruction. and

combinations embodied in pointed out i Referring ings:---

of parts will be described as an illustrative machine and n the appendedclaims.

to the accompanying drawthe feed be raised Fig. 1 is a front elevationof the machine in partly in elevation and,

partly in section, showing more particularly 7 the mounting of the feedroll; r Fig. 4-. is a perspective showing more par.- ticularly themountingof the presser-foot;

Fig. 5 is a perspective showing more particularly the chip deflector andthe knife guard; Fig. 6 is a perspective showing the presserfoot, theauxiliary edge gage and the manner, in which the two members aremounted;

Fig. 7 is an elevation showing the knife andthe chip deflector;' f

Fig. 8 is a perspective showing the belt shifting mechanism; Fig. 9 is asection showing the friction clutch through which the feed roll shaft isdriven; and f I i j Fig. 10 is an end view of the feed roll and asection of the mechanism for adjusting the roll toward and from theknife. Referring first more particularly to Fig. 1,

the illustrated machine" is of the Amazeen type and comprisesa rotaryskiving knife 11 to which the work is fed by a feed roll 13 anda'co-operatingfeed disk 15, a grinder 17 be ing provided forsharpeningthe knife. The knife is fast to the lower end of a shaft 19which is rotatable in a sleeve 20, said sleeve being carried'by bearings21, 23, which are integral with the frame .25 of the machine. A clampingmember 27 engages the sleeve 20 between the bearings 21 and 23 and isengaged by an adjusting screw 29 by turning which the knife may beraised and lowered to provide for work of different thicknesses. Nearthe upper end of. the knife shaft 19 is a pulley 31, a driving belt 33passing around this pulley, over suitable guide pulleys and around apulley 35 on the driving shaft 37. A. second belt 39 passes around asecond pulley 41, around suitable guide pulleys and around a pulley onthe shaft of the grinder 17. .A third belt 43 passes around a pulley 45on the driving shaft and around pulley 17 on a counter-shaft l9, thislast-named belt serving, as will presently be described, to drive thefeed roll 13. The driving shaft 37 is rotated from a suitable source ofpower, usually located beneath the bench upon which the machine stands,by means of a belt 51 whichpasses over a pulley 53 also fast to thedriving shaft 37. This belt 51 may be shifted from the tight pulley 53to the loose pulley 55 when desired by manipulating the hand lever 57 ofa belt shifter. This 'belt shifter is shown in detail-in Fig. 8 andcomprises a forked arm 59 which embraces the belt 51.

Referring now more particularly to Figs. 5 and 7 there'are associatedwith the knife a chip deflecting mechanism and a knife guard. The chipdeflecting mechanism comprises a stationary chip deflector 61 locatedabove the point at which the cutting of the work takes place, so thatthe chips as they are form ed will be directed upwardly between theknife and the deflector in the manner indicated by the arrow 63 in. Fig.7. This chip deflector is carried at the outer ends of flat arms 64which are slidable in grooves in a bracket 65, the bracket beingfastened to the bearing 23. The deflector 61 may thus be adjusted towardand from the axis of the knife so as to compensate for the decrease insize of the knife as it is worn down by being ground. A clamping screw67 threaded into the bracket 65 engages one of the arms 64 and holds thedeflector 61 in adjusted position. In use, the deflector 61 is adjustedapproximately into the position shown in Fig. 7 so that, as has beenexplained, the chips are directed up behind it. The knife rotates in thedirection indicated in Fig. 5 by the arrow; and in order to aid incarrying the chips away from the cutting point the lower end of theknife carrier is provided with a series of grooves69 whichengage thechips and throw them to one side.

When no chip deflecting mechanism is provided in a machine of this kind,the chips tend to interfere with the proper operation of the machine byaccumulating at the cu ting point and getting beneath the presserfoot,by winding around the knife shaft, and in various other ways. With thepresent device the chips and dust are immediately engaged and thrown offto one side where they can produce no such disadvantageous results. Itshould be noted that the grooves 69 in the rotating knife carrier notonly act mechanically upon the chips and dust but also act in a measureas a fan to blow the chips and dust away.

When the inner edge of a vamp is being skived, it frequently happens, inturning the vamp, that some portion of the edge which has already beenskived is brought into contact with one side of the knife and therebyout. In order to prevent this and similar undesirable occurrences, thereis provided a knife guard 71 part of which is located beneath the knifeand part of which is located opposite the cutting edge of the knife. Theportion 171 beneath the knife has a substantially straight thin edgewhich is located close to the under side of the knife, while the raisedportion 271 has an upright face spaced from the edge of the knife andhaving a contour corresponding to that of said edge. This guard 71 iscarried by a bent stem 73 which passes through a block 75 and is held inad justed position therein by a set screw 77. The stem of the blockextends up into a socket in the frame of the machine and is held inadjusted vertical and angular position by a set screw 7 9. With sible toadjust the guard accurately into proper position as the knife wearsaway, due to being ground.

Referring now more particularly to Figs. 1, 9 and 10, the manner inwhich the roll and feed disk is driven will be described. Fast to theshaft 49 which carries the pulley 17 is a small gear83 which meshes witha large gear 85, the last-named gear being loosely mounted upon a hub 87which is integral with a horizontal shaft 89. Fastened to the hub 87 ofthe shaft 89 by a screw 91 and held from turning by a pin 93 is a disk95; and located between the disk and the gear is a friction disk 97 sothat when the gear 85 is moved to the right the shaft 89 will befrictionally clutched to the rotating gear 85. In order to permit theclutch thus to be thrown in, a sleeve 99 is loose on the shaft 89, butheld from rotation with respect thereto by apin 101 which passes througha vertical slot in the flange at the right-hand end of the sleeve. Thesleeve is thus held from rotation with respect to the shaft 89 but maybe moved a shortdistance longitudinally thereof. Located between theleft-hand end of the sleeve 99 and a slidable collar 103 is a coiledspring 105; and located on the opposite side of the collar 103 from thatwhich is engaged by the spring is the upper end of a lever 107 fast to arock-shaft 109 and pivoted at its lower end at 111 to a link 113. Thislink 113 (see Fig. 1) is pivoted at its left-hand end at 115 to thedownwardly extending arm of a bell-crank lever 117. lever is pivoted at119 to the frame of the machine, and the horizontal arm of the lever ispivoted at its right-hand end to the upper end of a treadle rod 121, thelower end of which is attached to a shown. WVhen, therefore, a downwardpull is exerted upon the treadle rod 121, the friction clutch, which hasjust been described, is thrown in and rotation is imparted to the shaft89. Inasmuch as the clutch is one of the friction type, it should benoted that by varying the force of the downward pull upon the treadlerod, the clutch may be permitted to slip more or less if desired, andconsequently the rate of rotation of the shaft this construction it ispos- I suitable treadle, not

This a the lever 107 and the spring 89 may be varied. If, on the otherhand, it is not desired to vary the rate of rotation of the shaft 89,but to cause the rate to be constant, thisresult may be accomplished byadjusting the set screw 123 (Fig. 1). This set screw is threaded throughthe outer end of a lever 125 which is fast to the rock-shaft 109, thelower end of the set screw abutting against the frame of the machine.'It will thus be seen that by manipulating the set screw 123, therock-shaft 109 may be rotated in a clockwise direction so as to exertthrough 105 the desired degree of pressure'upon the friction clutch.

The shaft 89, as will presently ap ear, is

practically a part of the feed roll siaftso' that, when the rate ofrotation of this shaft is varied, the rate at which'ithe work is fed isalso varied. As has been explained above, the feed disk 15 cooperateswith the roll 13 in feeding the work. It is therefore desirable thatwhen the rate of rotation of the feed roll is varied, the rate ofrotation of the feed disk should be similarly varied. This result isaccomplished in the present machine by driving the feed disk from thefeed roll shaft. To this end there is fast to the shaft 89 a pulley 127which is connected by means of belt 129 with a pulley 131 which is fastto the shaft 133 on the lower end'of which the feed disk is carried. Theshaftofthe feed disk is mounted in the manner. common in machinesof thistype, being preferably held in the position shown by a spring 135 whichpermits it to rise when a piece of work is fed to themachine. Thepartsof the machine are so proportioned and the driving mechanism soconstructed that the peripheral velocity of that portion of the feedroll which cooperates with the feed disk is substantially the same asthe corresponding portion of the feed disk. In other words, the two feedmembers, feed roll and feed disk, which engage respectively the underside and the upper side of the work, both tend to feed the work at thesame rate. With the construction in which the feed disk is driven fromthe feed roll shaft, it will be obvious that any change in the rate ofrotation of the feed roll shaft will correspondingly change the rate ofrotation of the feed disk andthat therefore the variation of the feed ofthe work will be properly accomplished.

The feed roll 18 of the present machine is adjustable about a point suchas that indicated at 137 in Fig. 5 which is located substantially in theupper element of the feed roll, but at a locality spaced from the end ofthe roll. A feed roll adjustable about such a point is shown, describedand claimed in application, Serial No. 317,311, filed Aug 13, 1919 inthe name of Dyer, upon which Patent l lo. 1,500,117 was granted July 8,192 1. Without at present going into the details of the reasons foradjusting the feed roll about such of the link 179 contacts a point, itwill be explained here merely that such adjustment permits differentsorts of scarfs to be produced merely by adjusting the roll angularly.Referring now more particularly to Figs. 3 and 10, the feed roll 13 isfast to the outer end of a shaft 139, the inner end of which isconnected by a universal joint 1l1 to short shaft 143, said last-namedshaft being keyed to and fitting telescopically within a hollow member145, the hollow mem her being in. turn connected by a universal join 117 with the shaft 89. With this construction it will be apparent thatrotation of the shaft 89 will cause rotation of the feed roll and thatthe roll may be adjusted angularly without interfering with itsrotation. '1 he shaft 139 is rotatable in a sleeve 151 which is adjustably held in a roll carrier 153 a pinch screw 155. The roll carrier153 is provided with two curved guides 157 the cenof curvature of whichis a horizontal line through the point 137 shown in Fig. 5, ght to theupperelement of the The curved guides are received in :espondinglycurved guideways 159 in a t wo-piece bracket 161, said bracket beingpivd to the frame of the machine at 163 and "istable about this pivot sothat the roll nay be'adjusted toward and from the edge of is knife inthe plane of the work when de- -c. In order to hold the bracket 161 intion and to facilitate the adjustment just rred to. aheaded stud 165passes through 167 which is fast to or integral with the frame themachine. l hreaded on the lower re 1 13d end of the stud 165 is a nut169 having iandle 17 3 by which it may be readily ied. An adjustingscrew held from longitudinal movement with respect to the bracket 161and threadedthrough the stud provides meansfor adjusting the bracket 161about its pivot 163 when the nut 169 has been loosened. Pivoted to theroll carrier 153 at 177 is one end of a link 179 the other end of whichis pivoted at 181 to the upright arm of a bell-crank lever 183 thehorizontal arm of which is pivoted at 185 to the upper end of a treadlerod 187. The bell-crank lever is pivoted to the machine at 189 so thatwhen the treadle, not shown. is depressed to exert adownward pull on therod 187 the feed roll 13 is adjusted angularly in a counterclockwisedirection. It is desirable, in a machine having an adjustable roll ofthis type, to provide limits between which the adjustniient may takeplace. When the treadle is depressed, the bell-crank lever is rocked ina clockwise direction until the right-hand end with the end of a setscrew 191. In order to limit the movement. of the bellcrank lever in theother direction there is provided on the upright arm ofthe bell-cranklever (see Fig. 1) an ear 193 which contacts with the endof a set screw195. It

will be understood, of course, that by changing the positions of the setscrews 191 and 195, the limits of angular movement of the feed roll maybe changed. As shown in Fig. 2, a pointer on the roll carrier and acooperating scale on the bracket- 161 are provided for the convenienceof the operator.

In machines of this type it is desirable to be able to adjust the rolllongitudinally of its shaft so as to vary its position with respect tothe point or axis'137 about which it is adjustable. To this and (seeFig. 3) there is threaded into the carrier 153a screw 197, said screwhaving upon it a collar and ahead between which extends a flange formedon the outer end of thesleeve 151. Consequently, by turning the screw inone direction or the other, the sleeve and with it the feed roll 13 maybe moved to the right or to the left, such movement being permitted bythe telescopic connection between the parts .143 and 145 which arelocated between the universal joints 141' and 147. Before so adjustingthe roll it will, of course, be necessary to loosen the pinch screw 155.

Referring now more particularly to Figs. 6 and 2, the construction andadjustment of thepresser-foot and the edge gages will be described. Thepresent machine, like that of the machine shown in the patent to Dyer1,327,028, is provided with a presser-foot and two edge gages, a mainedge gage and an auxiliary edge gage, the construction being such thatthe work may be presented as may be desired either with its edge inengagement with the auxiliary gage or in engagement with the main edgegage. The main or stationary edge gage is shown at 199 and the auxiliaryedge gage at 201. The auxiliary gage 201. is substantially like that ofthe patent, being fast to the end of a lever 203 which is pivoted at 205to a block 207. This block 207 is slidable in the general direction ofthe axis of the feed roll in a guideway formed in a plate 231 and may beadjusted forward and back by means of a thumb nut 211 which is held frombodily movement in thedirection of the adjustment, but may be rotatedupon a screw 213, the screw being fast at one end to the block 207. Theauxiliary gage is pressed downwardly by a spring 215 which surrounds apin 217 (Fig. 3), said spring at its lower end resting upon the lever203 and its upper end bearing against an overhanging arm on the block207. The lower end of the pin has a head 219 which engages the underside of the lever 203 and at its upper end is threaded to receive thethumb nut 221. By turning this thumb nut the lever 203 may be raised andlowered about its pivot 205. Thus far the construction and mounting ofthis auxiliary edge gage is or may be substantially like that shown inthe patent. It is sometimes desirable to hold this auxiliary edge gage201 in raised position so as to facilitate presenting the edgeof thepiece of work to the main or stationary edge gage 199. The head 219 isordinarily received in a groove formed in the under side of the lever203; but when it is desired to hold the auxiliary gage permanently inits raised inoperative position the lever is first raised by hand andthen the pin 217 is rotated until the head 219 engages the under side ofthe lever 203 and holds it in raised position as shown in Fig. 3.

In the machine of Patent No. 1,327 ,028, a presser-foot is shown whichmay be raised and lowered to provide for work of different thicknesses;but, in raising and lowering the foot, it is tilted more or less so thatin some of its positions it does not bear with all of its operative faceupon the work. In the machine of the present invention a presser-foot isprovided which is compelled to move in a vertical the whole of itsoperative face will press uniforinly upon a piece of work whether thework be thick or thin. Referring now more particularly to Figs. 4 and 6,the presser-foot 223 has formed integral with it a cylindrical stem 225which is received in a cylindrical socket 227 formed at the outer end ofa bracket 229 which is integral with the plate 231. A lever 233 having abeveled outer end which fits loosely in a slot in the stem 225 ispivoted at 235 to the bracket 229. A spring 237 has its lower endbearing on the plate 231 and its upper end bearing against the underside of the lever 233. Threaded through the lever 233 is a screw 239having a reduced lower end which fits into the coils of the spring 237.The spring 237 tends to raise the inner end of the lever 233 so as toforce presser-foot 223 downwardly against the work. In order to limitthe extent of the downward movement of the presser-foot 223 the extremeinner end of the lever 233 is provided with an eye 241 through whichpasses loosely the stem of a screw 243 which is threaded into the plate231. lVith this construction it will be apparent that the presser-foot223 may be raised and lowered by turning the nut which is threaded uponthe upper end of the screw 243 and that the tension of the spring 237may be varied by turning the screw 239. It will be noted too that as thepresser-foot is raised and lowered, it moves in the substantiallyvertical path determined by the socket 227. In order to prevent thepresser-foot from turning angularly in a horizontal plane, the inner endof the foot has a vertical flat face which contacts at all times with asimilar face 245 formed upon an extension of the main edge gage 199.Engagement of these two faces not only pre vents the presser-foot fromturning angularly in a horizontal plane but prevents the edge of theleather which is being skived from working up between the presser-footand the edge gage. It is at times desirable to adjust the presser-foot,the main edge gage and the direction when it is adjusted so that i {Ijusted to more or less upon the treadle and thereby auxiliary edge'gage'in unison in a direction transverse to the direction of feed ofthe work; and to this end the plate 231 which carries directly orindirectly all of these parts hasbeveled edges which are received in.corwithdrawn suflicientlyv Thus after the screw is loosened the plate231 carrying all the parts which have been mentioned, may be adjustedtoward and from the line of feed and then clamped in position wheredesired.

In the operation of the machine, assuming that the feed roll '13occupies the angular position shown in the drawings and that in suchposition the upper element of the roll is substantially parallel to theplane of the cut of the knife, and that the operator presents the edgeof the work beneath the auxiliary gage 201 and in contact with the gage199, in such case a so-called shoulder scarf will be produced. If afeather-edge scarf is desired then the treadle connected to the rod 187will be 1 depressed prior to presenting the work to the machine, so asto tilt the feed roll about its axis 137. If a seam scarf having astraight inclined surface and a comparatively thick edge is desired,then with the treadle held depressed, the edge of the work willbepresented to the auxiliary gage 201. If a large number of scarfs of thesame character are to be produced consecutively upon a group of piecesof work, the feed roll may first be adthe desired angular position andthen locked in that position by means of a set screw 252 which isthreaded through the bracket 161 and bears with its end against thecarrier 153.

The knife 11 is rotating continuously as long as power is being appliedto the belt 51 and the belt is on the tight pulley; but the feeding ofthe work does not begin until the treadle which is connected with therod 121 is depressed. As soon as that occurs, the feed roll and feeddisk begin to rotate so as to ad- Vance the work to the knife. If,during the feeding of the work, a sharply curved edge is encountered,the operator may ease pp crease the rate of feed; this control of therate being particularly effective since the rate of rotation of the feeddisk as well as that of the feed roll is varied.

Although the invention has been set forth as embodied in a particularmachine, it should be understood that the invention is not limited inthe scope of its application to the particular machine which has beenshown and described.

' tilting as it Having thus described myinvention, what I claim as newand desire to secure by Let-, ters Patent of the United States is 1. Amachine of the class described hav-. ing, in combination, a rotaryskiving knife, a rotary feed roll an edge gage having a face againstwhich the edge of the work isheld during the skiving operation, apresseradapted to hold the'work' against the roll, said presserhaving anend face in contactwith the face of the edge gage, and means whereby thepresser. may be raised and lowered while maintaining the two 'lastnamed. facesin contact.

2. A machine of the class described hav ing, in combination, a rotaryskiving knife, a rotary feed roll, an edge gage having a face againstwhich the edge of the work is held during the skiving operation, apresser-foot overlying videdwith a stem, a rigid member having aguideway to receive said stem, and means for: raising and lowering thepresser-foot,the guideway being constructed to hold the foot fromtilting as it is raised and lowered.

3. A machine of the class described having, in combination, a rotaryskiving knife,a r0-. tary'feed roll, an edge gage having a face againstwhich the edge of the work is held during the skiving operation, apresser-foot overlying the feed roll,-said foot being provided with astem, a rigid member having a. guidewayto receive said stem,saidguideway being constructed tohold the foot from is raisedandlowered, a lever connected with the stem and pivoted to a rigid part ofthe machine, a spring for urging the lever in a direction to move thepresser foot toward the roll, and an adjustable stop to limit the extentof such movement.

4. A machine of the class described having, in combination, a rotaryskiving knife, a rotary roll for feeding work to the knife, anadjustable plate having a bracket formed with a guideway which extendsin a direction normal to the surface of the roll, a presser-foot havinga stem slidably mounted in the guideway, and means engaging the stem toraise and lower the presser-foot.

5. A. machine of the class described hav ing, in combination, a rotarydisk skiving knife, a rotary roll for feeding work to the knife, apresser-foot for holding the work against the roll, the constructionbeing such that the chips or skivings pass up over the knife, a chipdeflector having its lower extremity located above and spaced from theknife at the locality in which the cutting takes place, and meanswhereby the deflector may be adjusted radially of the knife to cate thedeflector properly in the first in stance andto provide for wear'of theknife.

6. A machine of the class described having, in combination, a rotarydisk skiving knife, a rotary roll for feeding work to the knife,

the feed roll, said foot being proa presser-foot for holding the workagainst the roll, the construction being such that the chips or skivingspass up over the knife, a chip deflector in the form of a downwardlyextending plate having its lower end located above and spaced from theedge of the knife at the locality in which the cutting takes place, saiddeflector being provided with a stem adjustably received in a groove ina stationary part of the machine, and means for clamping the stem inadjusted position.

7 A machine of the class described having, in combination, a rotary diskskiving knife, means for feeding a piece of work to the knife in suchmanner that the chips or skivings pass over the knife, a chip deflectorbetween which and the knife the chips pass, and rotary means forengaging the chips and diverting them to one side of the line of feed.

8. A machine of the class described having, in combination, a rotaryshaft having a hub at one end thereof, a disk skiving knife fastened tothe shaft below the hub, and means for feeding a piece of work to theknife in such manner that the chips or skivings pass over the knife,there being formed on the hub a series of shoulders which engage thechips and divert them to one side of the line of feed;

9. A machine of the classdescribed having, in combination, a rotaryshaft having a hub at one end thereof, a disk skiving knife fastened tothe shaft below the hub, and means for feeding a piece of work to theknife in such manner that the chips or skivings pass over the knifethere being cut in the hub a series of grooves to form shoulders whichengage the chips and divert them to one side of the line of feed.

10. A machine of the class described having, in combination, a rotarydisk skiving knife, a feed roll and a cooperating feed disk foradvancing the work to the knife, means for adjusting the roll angularlyto vary the inclination of the scarf manipulation of which adjusts theroll bodily in a direction parallel to its axis, and means for rotatingthe roll constructed and arranged to remain operative during eitheradjustment.

11. A machine of the class described having, in combination, a rotaryskiving knife, a rotary feed roll, a work gage to which or beneath whichthe edge of the work may be presented, said gage being normally inlowered, operative position and means for holding the gage in raisedposition when desired to facilitate the presentation of work beneath it.

12. A machine of the class described having, in combination, a rotarydisk skiving knife, a feed roll and a cooperating feed disk foradvancing the work to the knife, means for adjusting the roll angularlyabout anaXis which is substantially tangential to an element of the rollto vary the inclination of the scarf produced, a member, manipulationproduced, a member,-

of which adjusts the roll bodily in a direction parallel to its axis,and means for rotating the roll constructed and arranged to remainoperative during either adjustment.

13. A machine of the class described having, in combination, a rotarydisk skiving knife, means for holding the knife from angular movement, afeed roll and a cooperating feed disk for advancing the work to theknife, means for adjusting the roll angularly to vary the inclination ofthe scarf produced, a member, manipulation of which adjusts the rollbodily in a direction parallel to its axis, and means for rotating theroll constructed and arranged to remain operative during eitheradjustment.

14-. A skiving machine having, in combination, a knife for skiving themargin of sheet material, means for feeding material to the knife, meansfreely operable at all times during the operation of the machine forangularly moving the feed means during the operation of the machine, anda track for confining the feed means to move angularly.

15. A skiving machine as defined in the next-above claim in which thetrack is adjustable.

16. A skiving machine having, in combination, a knife for skiving themargin of sheet material, angularly adjustable means for feeding thematerial to the knife at varying angles to vary the scarf cut in the margin of the mate-rial, an intermediately pivoted lever, means connectingthe feed means with the lever on one side of its pivot, means acting onthe lever on'the other side of the pivot to effect angular adjustment ofthe feed means through the connecting means, and means for adjustablylimiting the movement of the lever in opposite directions to limitadjustably the angular adjustment of the feed means in oppositedirections.

17. A skiving machine having, in combination, a rotary knife, a feedroll and a feed disk for feeding material to the knife, the feed rollbeing adapted to occupy a normal position in which the feed roll iseffective to feed the material, a lever, a link connect-- ing the leverto the feed roll, a member underthe control of the operator foractuating the lever to move the feed roll through the medium of the linkfrom the normal position to a second effective position, and meanstending to return the ma-l position, the lever-actuating means acting inopposition to the tending means.

In testimony whereof I have signed my name to this specification.

MILTON H. BALLARD.

lever towards the nor

